Fleetwood Brougham V8-307 5.0L (1989)
PROM - Programmable Read Only Memory: Customer Interest
Engine - Surge Under Moderate Acceleration
Bulletin No.: T-91-103
File in Group: 6E
Number: 89
Corp. Ref. No.: 116003
Date: July, 1991
SUBJECT:
SURGE OR CHUGGLE UNDER MODERATE ACCELERATION
MODELS AFFECTED:
1988-1990 BROUGHAMS WITH 5.0L ENGINE
Some 1988-1990 Broughams with the 5.0L engine may experience a 40-50 mph surge or chuggle under moderate acceleration with the torque converter
clutch engaged.
A service PROM is available through GMSPO that will address this condition. These service PROM's should only be utilized in cases where it has been
determined that the condition is not caused by engine mechanical or ignition systems.
Refer to the chart below for the appropriate PROM application:
Service
Service
Service
Emission
PROM
PROM
Broadcast
Model Year
System
P/N
I.D. *
Code +
1988
Cal.
16156504
6483
AWPK
1989-1990
Cal.
16156639
6493
AWPL
1988-1990
Fed.
16156673
6653
AWRD
*
PROM I.D. can be read with a scan tool connected to the ALDL connector.
+
Broadcast code can be seen through the access hole on the top side of the PROM.
